Lower the compression on Big Block??
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I want to lower the compression on my Big Block from 10.5 : 1, not looking to get to a specific number I just want to be able to run pump gas.
Here is what I have: Engine: 446 Stroker - .030 bored 400 block – 440 Crank – Alum Childs & Albert Pistons running 10.5 Compression - 906 Heads Heads have not been milled and block has not been decked. In a related post I asked this question along with a Camshaft issue but want to start a new thread on this topic, I do appreciate all the good information on the last post. I have been told I could run Head Shims and or Thicker Head gaskets. How much will the .020 head shims lower the compression? Then how much with the addition of the thicker gaskets? (.051-.059) Also machining of the Pistons is an option, I have attached a picture of my Pistons. I can face them down that is not a problem, plus it’s won’t cost anything. Just don’t know how much to face off, any good rule of thumb? Thanks |
You are prob at more thah 10.5 to 1 C/R. Need the deck height, piston dome volume, head gsk thickness, head cc (prob about 88 cc on a 906 head) . I have a similar build and am at 12.5 to 1 C/R
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Send this info, and then actual C/R can be determined.
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